Horn.



' PATENTED AUG. 18, 1908.

LEONARD L. TFiRHUNE, OF NEWARK, NEW JERSEY.

HORN.

are. 396,672.

Specification of Letters Patent.

Patented Aug. 18, 1908.

Application filed September 8, 1906. Serial No. 333,815.

To all whom it may concern:

Be it lmown that I, LEONARD L. TERHUNE, a citizen of the United States, residing in the city of Newark, county of Essex, and State of New Jersey, have invented certain new and useful Improvements in Horns; and I do hereby declare the following to be a full, clear, and exact description of the same, such as will enable others skilled in the art to which it pertains to make and use the same.

The object of my invention is to produce a horn for use in amplifying the vibrations produced by the sound box of a phonograph or like instrument, of such a size that it shall possess greater strength for a given weight of materia used and at the same time, improve the carrying and amplifying qualities of such an instrument.

Hitherto, in the manufacture and shipment of horns, great difficulty has been experienced in producing a horn of the requisite strength to stand the wear and tear of rough usage from the thin material which it is necessary to use in such manufacture. Ii

have found that, by making up the horn of elements which have short curvature, I. am able to roduce a born from relatively light materia which shall have, not only the requisite strength, but improved sound carrying and amplifying qualities.

The configuration of the bell and body of the horn lends itself admirably to the manu facture of the structure from other materials than sheet-metal, as for example, papier mach or glass, and in case I use either of.

the latter named materials, the whole horn, i. 8., body and bell moutlrmay be pressed to shape in suitable molds or dies, thereby forming horns of a single integral piece of material, and the resulting horns will be found to possess greater strength and better sound carrying qualities than if made up of separate parts from those materials. In some cases, I may make the conical body of metal as usual and the bell of glass, papior macho or other suitable material. In any case, the )ctal sections are both longitudinally and laterally arc-shaped.

In the accompanying drawings, forming a part of this specification, Figure 1 is a side.

view of a complete horn, embodying my improvements. Fig. 2 is a cross-section on line x-a: of Fig. 1, and Fig. 3 is a similar crosssection of a modified form.

Similar letters of reference refer to like parts throughout the specification and drawin s.

lhe horn illustrated in big. 1 may be described as composed of the body a of conical shape having at its smaller end the inte ral ferrule b, and the bell or flaring part 0. he body a and the ferrule b are of any usual or preferred construction and are ordinarily made by shaping a piece of sheet metal into such form and )roviding a bead or groove (1 at its larger end for the rece tion of a flange formed upon the smaller cm of the bell 0.

My improvement resides more particularl y in the form, shape and structure of the bell mouth 0, which consists of a plurality of what has come to be known in the art as petals, from their well known resen'iblance to the petals of a bell shaped flower. The bell as illustrated in Fig. 2 consists of a plurality of petals curved both longitudinally and in cross-section, and united together at their adjacent edges by any desired means as for example, by a lock seam, when the horn is made up of sheet metal or united integrally when made of glass, papier mach or other similar material. Each petal is laterally curved so as to present in cross-section, the arc of a circle ol less radius than the corresponding radius of the bell mouth at that point.

The outer ends of the petals are so shaped that when theyv are united to form the bell, heinouter margins all lie in the same plane as indicated at 0, so that when the horn is rested upon the bell upon the floor or any level surface, each one of the petals will find a full and complete bearing upon such level. surface, and not, as has hitherto been the case, rest upon some projecting point or scallop. In the form illustrated in Fig. 3, the petals instead of being convex outwardly as shown in Fig. 2, are convex inwardly, while the outer ends of the petals are'shaped so as to lie in the same plane as disclosed in the structure illustrated in Figs. 1 and 2. In order to lend stiffness to the individual petals, I may impress upon their surfaces, any scroll or design f as desired; this scroll or design is pressed inwardly from the outer surface of the horn, and forms what may be termed, a corrugation in each of the petals, and appearing in relief upon the inner side, adds much to the beauty of the horn. The bell c after beany preferred manner.

or in case the entire horn is integral as of other materials, than sheet metal, the bell and body may be separatedby a bead the external shape of which is identical with. the grooved bead (1. It will thus be noted that each one of the petals formed either as illustrated in Fig. 2 or Fig. 3, produce an arch shaped structure very rigid because of the comparative shortness of the lateral curvature of the parts, and thereby, less liable to distortion through rough usage. I find also, that horns of this character are capable of producing clearer and less metallic reproductions, than is the case Where the petals are substantially plain in cross-section.

Iclaiin: I

1. A horn for amplifying sound, compriseeeeve ing a conical horn body and flaring bell mouth rigidly secured to said body, said bell mouth composed of a plurality oi petal sections secured together at their longitudinal curved laterally in the are. of a circle oi less radius than the corresponding radius oi the bell month and longitudinally curved throughout its length, said petal sections hav perpendicular to the axis of the horn.

2. A horn bell composed of a plurality of petal sections, each section being curved laterally in the arc of a circle of less radius than said sections being joined together at their meeting edges with the outer margins of said etal sections all lying in a plane perpendicua1 to the axis oi the horn.

This specification signed and witnessed this 25th day of August 1906.

LEONALtD TERHUNE. Witnesses:

W. A. LAUR'UINCE, C. A ALLIs'roN.

edges, each section being independently I ing their outer margins all lying in a plane .o

the corresponding radius of the bell month, i 

